Revetment.



J. McGILLIVRAY.

REVETMENT. APPLICATION yFILED MAY 7| l9l4.

Patented Aug. 3, 1915.

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JAMES MGGILLIVRAY, OF SACRAMENTO, CALIFORNIA.'

REVETMENT.

Specification of Letters Patent.

Patented Aug. 3, 1915.

Application filed May 7, 1914. Serial No. 837,060.

To all whom it may concern:

Be it known that I, JAMES MGGILLIVRAY, a citizen of the United States, residing at Sacramento, in the county of Sacramento and State of California, have invented certain new and useful Improvements in Revetments, of which the followingis a specification.

This invention relates to revetments especially designed for the protection of levees and the like by means of reinforced concrete and contemplates a monolithic structure made n situ above the water level and combined with a group of concrete blocks united together' to cover the levee below the water level. y

The invention therefore consists in the structure and combination of partsfor the specified purpose substantially as hereinafter set forth and claimed.

To fully disclose the invention and its application reference is made to the accompanying drawings which form a part of this specification. Therein- Figure 1 represents in vertical ysection on line 1 1 of Fig. 2 a levee protected by the improved revetment; Fig. 2 is an elevation of a portion of said revetment; and Fig. 3 represents in perspective one of the revetment units or blocks of reinforced. concrete used below the water level.

The reinforced concrete revetment uni-ts patented by me Sept. 29, 1914, and on which other patents are pending, Serial No. 796,57 9 October 6/18; Serial Numbers 882,038 and 882,039 Mar. 2/14 and Serial No.,839,628 May 19/14, are well adapted for covering that portion of the embankment below water, for they consist of rectangular blocks which may be formed where convenient and transported to the place of use. They are also provided with holes at their ends through which suitable ties, rtypified at 14, may be passed for connecting themtogether. They also have grooves along theirends in which cables may be conned by the act of tying the blocks together. Thisprovides for securing such blocks to cables andlowering them from a barge, or down the embankment, to the desired distance below the water level the cables having first been oonnected at their lower ends to a metal strip, indicated at 15, which forms a washer common to all the cables'in each longitudinal section of revetment.r Such'revetment units are typified at 4 in Figs. 1 and 2 and shown individually in Fig. 3. The, tie holes are at 5 and the cable grooves at 6. The group of such units is extended above the level of the water, indicated at 16, at the time of laying, the cables being preferably anchored at the top'of the embankment in any suitable manner as indicated at 7 by attaching them to dead men or other forms of anchors. The cables are represented at 8. The embankment above the group of blocks is then covered with concrete in any convenient manner and to the desired extent and to a depth preferably equal to the thickness of the blocks which it adjoins. A monolithic structure 4 is thus formed in place and it is reinforced by the cables 8 which it also covers and helps to hold inplace.l To locate the` cables in the body of the monolithic structure Ts may be used as desired, the same being ytypified at 9.

Other reinforcement of the monolithic structure may be added transversely of the cables. Suchy may consist of rods indicated at 10.

It is also desirable in some latitudes to provide expansion joints in the monolithic structure. Such joints are indicated at 11 as unfilled and at 12 as filled by any suitable yielding material such as an asphaltum compound. In latitudes where there is no great variation in temperature the expansion joints will be omitted.

The concrete blocks used at the lower edge of this combined revetment are preferably. reinforced as indicated at 18 in Fig. 3. Thus a revetment is formed of reinforced concrete throughout and one which can be laidrapidly and which will hold its place to the perfect protection of the levee or embankment.

The invention claimed is In a revetment the combination of reinforced concrete blocks located below the water level, reinforced monolithic structure above the water level and anchoring means for said blocks extending through the monolithic portion-and forming part of the reinforcementtherefor.4

In testimony whereof l have afXed my signature in presence of two witnesses.

' JAMES MGGILLIVRAY- Witnesses.:

CLINTON E. HARBER, Amon M. PACHALL.

Copies of this patent may be obtained for ve cents leach, by addressing the Commissioner of Patents,

' Washington, D. G. f

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